"That will be a decision I will have to make," Wenger said on Campbell, whose advancing years have led to careful management of his workload. "We have to be conservative with him and see how he feels after today."

Arsenal are already without Cesc Fabregas and Andrei Arshavin for the match, while Robin van Persie is still at least two weeks away from a return.

Arsenal came back from 2-0 down to secure a 2-2 draw at Emirates Stadium and will need to score at Camp Nou if they are to progress.